Herbicidal N-phenyl-N-methylurea derivatives

Abstract

Novel N'-4-(2-naphthyloxy)phenyl-N-methylurea derivatives of the formula: <IMAGE> wherein X is a hydrogen atom, a halogen atom or a trifluoromethyl group and R is a methyl or methoxy group having a herbicidal activity, particularly effective in exterminating weeds in the cultivation of soybean and gramineous crops such as wheat and barley, and/or having a fungicidal activity especially effective in controlling the rust of wheat and barley.

What is claimed is: 
     
       1. A herbicidal composition which comprises as an active ingredient a herbicidally effective amount of a compound of the formula: ##STR19## wherein X is a hydrogen atom, a halogen atom or a trifluoromethyl group and R is a methyl group or a methoxy group, and an inert carrier. 
     
     
       2. The composition according to claim 1, wherein X is a hydrogen atom, a chlorine atom, a bromine atom, a fluorine atom or a trifluoromethyl group. 
     
     
       3. The composition according to claim 1, wherein X is a hydrogen atom and R is a methoxy group. 
     
     
       4. A method for controlling weeds which comprises contacting the weeds with a compound of the formula: ##STR20## wherein X is a hydrogen atom, a halogen atom or a trifluoromethyl group and R is a methyl group or a methoxy group. 
     
     
       5. The method of claim 4, wherein X is a hydrogen atom, a chlorine atom, a bromine atom, a fluorine atom or a trifluoromethyl group. 
     
     
       6. The method of claim 4, wherein X is a hydrogen atom and R is a methoxy group. 
     
     
       7. A method for selectively combating weeds in the cultivation of soybean and/or gramineous crops, which comprises applying to the area wherein said crops are cultivated a herbicidally effective amount of a compound of the formula: ##STR21## wherein X is a hydrogen atom, a halogen atom or a trifluoromethyl group and R is a methyl group or a methoxy group. 
     
     
       8. The method of claim 7, wherein X is a hydrogen atom, a chlorine atom, a bromine atom, a fluorine atom or a trifluoromethyl group. 
     
     
       9. The method of claim 7, wherein X is a hydrogen atom and R is a methoxy group.